From a7f3298359f9662cec630faa124d3be4f7575511 Mon Sep 17 00:00:00 2001
From: David Ruan <ruanwz@gmail.com>
Date: Tue, 3 Mar 2026 15:53:05 +0800
Subject: [PATCH] fix: work around bash 3.2 heredoc bug causing unbound
 variable error

macOS ships bash 3.2 which has a bug where `"$(cat <<'DELIM'...DELIM)"`
incorrectly expands variables after a `case/esac` block inside the
single-quoted heredoc. This caused `set -u` to trigger
"account: unbound variable" during installation.

Replace `content="$(cat <<'EOF'...EOF)"` with
`IFS= read -r -d '' content <<'EOF' || true` in both
write_ccm_wrapper and write_ccc_wrapper to avoid the command
substitution entirely.
---
 install.sh | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/install.sh b/install.sh
index e2c2c02..18c5c06 100755
--- a/install.sh
+++ b/install.sh
@@ -481,7 +481,7 @@ exec "$CCM_SH" "$@"
 EOF
   else
     local content
-    content="$(cat <<'EOF'
+    IFS= read -r -d '' content <<'EOF' || true
 #!/usr/bin/env bash
 set -euo pipefail
 CCM_SH="__DATA_DIR__/ccm.sh"
@@ -491,7 +491,6 @@ if [[ ! -f "$CCM_SH" ]]; then
 fi
 exec "$CCM_SH" "$@"
 EOF
-)"
     content="${content//__DATA_DIR__/$data_dir}"
     printf '%s\n' "$content" > "$target"
   fi
@@ -631,7 +630,7 @@ fi
 EOF
   else
     local content
-    content="$(cat <<'EOF'
+    IFS= read -r -d '' content <<'EOF' || true
 #!/usr/bin/env bash
 set -euo pipefail
 CCM="__DATA_DIR__/ccm.sh"
@@ -751,7 +750,6 @@ else
     exec claude "${claude_args[@]}"
 fi
 EOF
-)"
     content="${content//__DATA_DIR__/$data_dir}"
     printf '%s\n' "$content" > "$target"
   fi